Redox-coupled permeable reactive barrier and method for evaluating the same

Abstract

The application relates to the field of groundwater pollution remediation, in particular to an oxidation-reduction coupled permeable reaction wall and an evaluation method thereof. The oxidation-reduction coupled permeable reaction wall comprises a cover plate, a cement outer wall body, water stop plates, a reduction chamber, an oxidation chamber and a mixing chamber. The three water stop plates are alternately and vertically fixed on the cement outer wall body and the top cover plate respectively, and the reduction chamber, the oxidation chamber and the mixing chamber are separated by the water stop plates. The reduction chamber and the mixing chamber are communicated by an upper pipeline, and the oxidation chamber and the mixing chamber are communicated by a lower pipeline. The reduction chamber is sequentially provided with a detachable coarse quartz sand plate, a fine quartz sand plate and an active reaction plate from bottom to top. Through the synergistic effect of reduction-oxidation-adsorption, the oxidation-reduction coupled permeable reaction wall can effectively deal with the composite contaminated groundwater to realize complete mineralization of organic pollutants, and has the advantages of high remediation efficiency and strong applicability.

Description

A redox-coupled permeable reactive barrier and its evaluation method Technical Field

[0001] This invention relates to the field of groundwater pollution remediation, and in particular to a redox coupled permeable reactive barrier and its evaluation method. Background Technology

[0002] With the rapid development of society, economy, industry, and agriculture, groundwater pollution has become a widespread environmental problem globally. Groundwater pollution is insidious and often involves complex processes, making remediation difficult. Currently, permeable reactive barrier (PRB) technology is one of the commonly used techniques for groundwater remediation. Under a natural hydraulic gradient, contaminated groundwater passes through a reaction medium, where pollutants undergo a series of physical, chemical, and biological reactions, transforming into less harmful compounds or immobilizing on the PRB. While existing PRBs can remove some pollutants from groundwater, their removal capacity is relatively low, only effective against single types of pollutants. They cannot effectively treat groundwater with complex pollution. Furthermore, the utilization rate of the reaction medium in traditional PRBs is low, they cannot be adjusted in a timely manner according to the type of pollution, are prone to clogging, and are difficult to replace, further hindering the application of PRB technology.

[0003] To address the above problems, many improvement methods have been proposed both domestically and internationally. For example, patent application number CN202222056853.X discloses a permeable reactive wall for groundwater pollution remediation. It uses multiple sequentially arranged reactive walls connected to a base via a plug-in connection, dividing the reactive walls into a grid pattern to form several reaction chambers. Within each chamber, biological reaction units or adsorption packing reaction units are arranged in an alternating pattern, facilitating individual inspection and maintenance of each chamber and reducing the difficulty of subsequent maintenance. Patent application number CN202122539217.8 discloses a permeable reactive wall device for removing pollutants from shallow groundwater. It sequentially arranges a polluted water tank, a permeable reaction water tank, and a remediation water tank along the groundwater flow direction. The permeable reaction water tank contains an adsorption material layer containing different types of reaction materials, such as clay minerals, activated carbon, polymer adsorbents, and immobilized microorganisms, thereby solving the complex pollution caused to groundwater during coal gangue treatment. Currently, the published patents mainly rely on the degradation effect of microorganisms, the adsorption effect of reaction media, and the reduction effect of reaction media to reduce the concentration of pollutants in groundwater. However, their ability to remove some highly mobile and difficult-to-degrade organic pollutants is very limited, and they cannot achieve complete mineralization of organic pollutants.

[0004] Recent studies have shown that advanced oxidation processes (PRBs) can efficiently degrade some recalcitrant organic pollutants in water, demonstrating strong application potential. The principle involves activating the oxidant to generate highly reactive oxygen species with strong oxidizing capabilities, which can degrade organic pollutants into smaller molecular intermediates or mineralize them into CO2, H2O, and inorganic salts, thus truly removing pollutants from water. However, its removal capacity for aromatic pollutants substituted with electron-withdrawing groups, such as nitroaromatics and chlorinated aromatics, is limited. Therefore, developing a widely applicable PRB process capable of efficiently degrading recalcitrant organic pollutants in groundwater is of great significance. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a redox-coupled permeable reactive barrier and its evaluation method.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] This invention discloses a redox-coupled permeable reactive barrier and its evaluation method:

[0008] The oxidation-reduction coupled permeable reactive wall includes a cover plate, a cement outer wall, a water-proof board, a reduction chamber, an oxidation chamber, and a mixing chamber;

[0009] The water-proof plate is provided in three parts, which are alternately and vertically fixed to the cement outer wall and the top cover plate. The reduction chamber, oxidation chamber and mixing chamber are separated by the water-proof plate.

[0010] The reduction chamber and the mixing chamber are connected by an upper pipe, and the oxidation chamber and the mixing chamber are connected by a lower pipe.

[0011] The reduction chamber is provided with a detachable coarse quartz sand plate, a fine quartz sand plate and an active reaction plate from bottom to top. The oxidation chamber is provided with a detachable active reaction plate and an adsorption reaction plate from bottom to top. The mixing chamber is equipped with a stirring device and an oxidant dosing pipe.

[0012] The evaluation method includes the following steps:

[0013] Water quality data from each water quality sensor on the reactive barrier is continuously collected within a preset time period to construct a database, and the water quality data from each water quality sensor is imported into the database.

[0014] After the data collection is completed, each water quality data in the database is regarded as a separate cluster, resulting in K clusters, where K is the number of water quality data.

[0015] Calculate the Manhattan distance between each cluster, generate a distance matrix based on the Manhattan distance, and merge the two clusters with the shortest Manhattan distance into a merged cluster family to obtain several merged cluster families;

[0016] Recalculate the Manhattan distance between each merged cluster and update the distance matrix based on the recalculated Manhattan distance. Repeat the above steps until the number of merged clusters reaches the preset number, then stop the iteration and output the clustering results.

[0017] Based on the clustering results, a dendrogram is constructed, and the water quality data in the database are assigned to the corresponding branches of the dendrogram. After the assignment is completed, the split points of the dendrogram are cut to obtain several branches, and the water quality data corresponding to different branches are mapped to different data storage spaces to obtain different types of water quality data subsets.

[0018] It also includes the following steps:

[0019] The prefabricated reactive water wall constructs a knowledge graph based on the standard discharge water quality data of different preset types of polluted water sources, and imports the standard discharge water quality data of the reactive water wall after treating different preset types of polluted water sources into the knowledge graph;

[0020] The real-time polluted water source information processed by the reaction wall is obtained, and the real-time polluted water source information is imported into the knowledge graph. The correlation degree between the real-time polluted water source information and various preset types of polluted water sources is calculated by the grey relational analysis method to obtain multiple correlation degrees.

[0021] The correlation degrees are sorted, the maximum correlation degree is extracted, the preset type of polluted water source corresponding to the maximum correlation degree is obtained, and the standard discharge water quality data information after the current reaction wall treatment is determined based on the preset type of polluted water source corresponding to the maximum correlation degree.

[0022] Standard curves for different water quality types are constructed based on the standard discharge water quality data; actual curves for the corresponding water quality types are constructed based on subsets of water quality data of different types.

[0023] An integration space is constructed, and actual curve graphs and standard curve graphs of the same type are imported into the integration space for pairing. After pairing, the lengths of the overlapping line segments between the actual curve graph and the standard curve graph are counted, as well as the lengths of the non-overlapping line segments. The degree of overlap between the actual curve graph and the standard curve graph is calculated based on the lengths of the overlapping line segments and the lengths of the non-overlapping line segments.

[0024] The actual curves corresponding to overlap degrees not greater than the preset overlap degree are marked as abnormal curves, and the actual curves corresponding to overlap degrees greater than the preset overlap degree are marked as normal curves.

[0025] Obtain the water quality type corresponding to the abnormal curve graph, assess the lifespan status of coarse quartz sand plate, fine quartz sand plate, activated reaction plate, and adsorption reaction plate based on the water quality type corresponding to the abnormal curve graph, and generate an assessment report based on the lifespan status.

[0026] Furthermore, in a preferred embodiment of the present invention, water inlet and drainage channels are provided on the cement exterior wall.

[0027] Furthermore, in a preferred embodiment of the present invention, valves and flow meters are provided on both the upper pipe and the lower pipe.

[0028] Furthermore, in a preferred embodiment of the present invention, the thickness of the coarse quartz sand plate is set to 10cm, and it is filled with coarse quartz sand with a particle size of 1.0mm-2.0mm.

[0029] Furthermore, in a preferred embodiment of the present invention, the thickness of the fine quartz sand plate is set to 10cm, and it is filled with fine quartz sand with a particle size of 0.5mm-1.0mm.

[0030] Furthermore, in a preferred embodiment of the present invention, the active reaction plate is 10 cm thick and is filled with a reaction medium comprising one or more combinations of zero-valent iron, iron-carbon materials and slow-release materials.

[0031] Furthermore, in a preferred embodiment of the present invention, the adsorption reaction plate is 10 cm thick and is filled with adsorption material.

[0032] Furthermore, in a preferred embodiment of the present invention, the adsorbent material includes artificial zeolite, activated carbon, and biochar.

[0033] Furthermore, in a preferred embodiment of the present invention, the surfaces of the coarse quartz sand plate, the fine quartz sand plate, the adsorption reaction plate, and the active reaction plate are provided with water-permeable holes, and the plate spacing is 5cm.

[0034] Furthermore, in a preferred embodiment of the present invention, it further includes one or more of the following oxidizing agents: hydrogen peroxide, potassium permanganate, and persulfate.

[0035] This invention addresses the technical deficiencies in the prior art and has the following beneficial effects:

[0036] (1) This invention couples the reduction and oxidation processes. Electrons or active hydrogen generated during the reduction process attack the electron-withdrawing groups of pollutants, thereby breaking down the barriers to subsequent oxidation. The oxidation process utilizes free radicals with strong oxidizing power to attack the remaining organic pollutants, achieving complete mineralization. Furthermore, an adsorption reaction plate is installed at the end of the process to further treat the remaining metal ions and oxidants in the groundwater, achieving complete purification of the polluted groundwater.

[0037] (2) A mixing chamber is provided in this invention, and a stirring device is installed in the mixing chamber to increase the turbulence of the water flow, which helps the oxidant to mix with the groundwater quickly;

[0038] (3) The present invention is equipped with a detachable permeable reaction plate, which makes it convenient for the operator to adjust the configuration of the reaction plate in a timely manner according to the degree of groundwater pollution and to replace the permeable reaction plate that has reached the end of its service life. This reduces the operational pressure of replacing the permeable reaction medium and helps the system maintain a high efficiency of sewage purification in the long term. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0040] Figure 1 is a schematic diagram of the structure of this reactive wall;

[0041] Figure 2 is a schematic diagram of the stirring device;

[0042] The following are the annotations in the attached diagram: 1. Cover plate; 2. Cement exterior wall; 3. Reduction chamber; 4. Oxidation chamber; 5. Mixing chamber; 6. Waterproof plate; 7. Coarse quartz sand plate; 8. Fine quartz sand plate; 9. Activated reaction plate; 10. Adsorption reaction plate; 11. Stirring device; 12. Oxidant dosing pipe; 13. Sampling port; 14. Flow meter; 15. Valve. Detailed Implementation

[0043] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner. Therefore, they only show the components related to the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0044] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention. Example 1

[0047] As shown in Figures 1 and 2, a redox-coupled permeable reactive barrier includes a cover plate 1, a cement outer wall 2, a water-blocking plate 6, a reduction chamber 3, an oxidation chamber 4, and a mixing chamber 5. Three water-blocking plates 6 are alternately and vertically fixed to the cement outer wall 2 and the top cover plate 1. Water inlet and outlet channels are provided in the outer wall. The reduction chamber 3, oxidation chamber 4, and mixing chamber 5 are separated by the water-blocking plates 6. The reduction chamber 3 and mixing chamber 5 are connected by an upper pipe, and the oxidation chamber 4 and mixing chamber 5 are connected by a lower pipe. Valves 15 and flow meters 14 are installed on the pipes to control the residence time of polluted groundwater in the reduction and mixing chambers and the flow rate of the groundwater.

[0048] The reduction chamber 3 is arranged from bottom to top with several detachable coarse quartz sand plates 7, fine quartz sand plates 8, and an active reaction plate 9. The coarse quartz sand plates 7 are 10cm thick and filled with coarse quartz sand with a particle size of 1.0mm-2.0mm. The fine quartz sand plates 8 are also 10cm thick and filled with fine quartz sand with a particle size of 0.5mm-1.0mm. The coarse and fine quartz sand plates are used to filter and remove impurities from the polluted groundwater. The active reaction plate 9 is 10cm thick and is filled with a reaction medium including one or more of zero-valent iron, iron-carbon materials, and slow-release materials. A suitable reaction medium is selected depending on the type of groundwater pollutant.

[0049] The oxidation chamber 4 is equipped with several detachable active reaction plates 9 and adsorption reaction plates 10 arranged sequentially from bottom to top. The adsorption reaction plates 10 are 10cm thick and filled with adsorbent materials such as artificial zeolite, activated carbon, and biochar. Therefore, when groundwater flows through the adsorption reaction plates 10, the remaining heavy metal ions and excess oxidant in the groundwater are adsorbed and removed by the adsorbent materials, thereby enhancing the treatment effect of the permeable reaction wall on groundwater pollution. The coarse quartz sand plate, fine quartz sand plate, adsorption reaction plate, and active reaction plate form the permeable reaction plate. The spacing between the permeable reaction plates is 5cm, and all surfaces contain permeable holes. The permeable reaction plates can be filled with materials in the chamber first, and then installed and fixed one by one to the side of the waterproof plate and the cement exterior wall using ground lifting equipment. The mixing chamber is equipped with a stirring device 11 and an oxidant dosing pipe 12. The added oxidant can be one or more of hydrogen peroxide, potassium permanganate, and persulfate. Specifically, the stirring device 11 is driven by a motor to rotate the shaft 111, which in turn drives the blades 112 to rotate, ensuring that the oxidant and groundwater are fully mixed. In addition, to monitor the treatment effect of the groundwater in a timely manner, the present invention also provides sampling ports 13 in the reduction chamber and oxidation chamber to periodically sample and test the groundwater, so as to replace the permeable reaction plates that have reached the end of their service life in a timely manner.

[0050] It should be noted that this invention, by setting up a reduction chamber and an oxidation chamber, allows for the combined treatment of contaminated groundwater through reduction and oxidation processes, thereby enhancing the treatment effect of the permeable reactive barrier on complex contaminated groundwater and achieving complete removal of organic pollutants. Specifically, contaminated groundwater enters the system through the inlet and, guided by a baffle plate, enters the reduction chamber. It is then filtered through coarse and fine quartz sand plates to remove impurities. Next, it enters the activated reaction plate, where it undergoes a reduction reaction with the activated packing material. Heavy metal ions are reduced, and some pollutants that are not suitable for direct oxidation are reduced to easily oxidizable forms. After remaining in the reduction chamber for a certain period, the groundwater enters the mixing chamber at a specific flow rate. Under the stirring of a stirring device, the groundwater and oxidant are mixed evenly and then enter the oxidation chamber through a valve. The oxidant is activated to generate free radicals with strong oxidizing capabilities, further degrading the remaining organic pollutants and completely mineralizing them. Finally, the remaining heavy metal ions and excess oxidant in the groundwater are further removed by the adsorption reaction plate, thus enhancing the treatment effect of the permeable reactive barrier on groundwater pollution.

[0051] In summary, this invention, by setting up reduction and oxidation chambers, allows for the combined treatment of contaminated groundwater through reduction and oxidation processes. This enhances the treatment effect of the permeable reactive barrier on complex contaminated groundwater, achieving complete removal of organic pollutants. By utilizing the synergistic effect of reduction-oxidation-adsorption, it effectively addresses complex contaminated groundwater, achieving complete mineralization of organic pollutants. It offers advantages such as high remediation efficiency, strong applicability, and easy replacement of reaction materials. Example 2

[0052] Furthermore, this invention provides an evaluation method for a redox-coupled permeable reactive barrier, used in conjunction with the redox-coupled permeable reactive barrier. The evaluation method includes the following steps:

[0053] Water quality data from each water quality sensor on the reactive barrier is continuously collected within a preset time period to construct a database, and the water quality data from each water quality sensor is imported into the database.

[0054] After the data collection is completed, each water quality data in the database is regarded as a separate cluster, resulting in K clusters, where K is the number of water quality data.

[0055] Calculate the Manhattan distance between each cluster, generate a distance matrix based on the Manhattan distance, and merge the two clusters with the shortest Manhattan distance into a merged cluster family to obtain several merged cluster families;

[0056] Recalculate the Manhattan distance between each merged cluster and update the distance matrix based on the recalculated Manhattan distance. Repeat the above steps until the number of merged clusters reaches the preset number, then stop the iteration and output the clustering results.

[0057] Based on the clustering results, a dendrogram is constructed, and the water quality data in the database are assigned to the corresponding branches of the dendrogram. After the assignment is completed, the split points of the dendrogram are cut to obtain several branches, and the water quality data corresponding to different branches are mapped to different data storage spaces to obtain different types of water quality data subsets.

[0058] It should be noted that water quality sensors, such as pH sensors, conductivity sensors, and dissolved oxygen (DO) sensors, are installed on the drainage channels of the permeable reactive barrier. Water quality data from the drainage outlets of the permeable reactive barrier is acquired through these sensors within a preset time period, resulting in a massive amount of water quality data, which is then aggregated into a database. Therefore, this method clusters this massive amount of water quality data to quickly obtain different types of water quality data subsets. These subsets are then clustered with different types of collected water quality data; for example, a subset of water quality data may contain clustered conductivity data. This method enables the clustering of collected water quality data, improving the efficiency of water quality assessment.

[0059] In addition, the evaluation method also includes the following steps:

[0060] The prefabricated reactive water wall constructs a knowledge graph based on the standard discharge water quality data of different preset types of polluted water sources, and imports the standard discharge water quality data of the reactive water wall after treating different preset types of polluted water sources into the knowledge graph;

[0061] The real-time polluted water source information processed by the reaction wall is obtained, and the real-time polluted water source information is imported into the knowledge graph. The correlation degree between the real-time polluted water source information and various preset types of polluted water sources is calculated by the grey relational analysis method to obtain multiple correlation degrees.

[0062] The correlation degrees are sorted, the maximum correlation degree is extracted, the preset type of polluted water source corresponding to the maximum correlation degree is obtained, and the standard discharge water quality data information after the current reaction wall treatment is determined based on the preset type of polluted water source corresponding to the maximum correlation degree.

[0063] Standard curves for different water quality types are constructed based on the standard discharge water quality data; actual curves for the corresponding water quality types are constructed based on subsets of water quality data of different types.

[0064] An integration space is constructed, and actual curve graphs and standard curve graphs of the same type are imported into the integration space for pairing. After pairing, the lengths of the overlapping line segments between the actual curve graph and the standard curve graph are counted, as well as the lengths of the non-overlapping line segments. The degree of overlap between the actual curve graph and the standard curve graph is calculated based on the lengths of the overlapping line segments and the lengths of the non-overlapping line segments.

[0065] The actual curves corresponding to overlap degrees not greater than the preset overlap degree are marked as abnormal curves, and the actual curves corresponding to overlap degrees greater than the preset overlap degree are marked as normal curves.

[0066] Obtain the water quality type corresponding to the abnormal curve graph, assess the lifespan status of coarse quartz sand plate, fine quartz sand plate, activated reaction plate, and adsorption reaction plate based on the water quality type corresponding to the abnormal curve graph, and generate an assessment report based on the lifespan status.

[0067] It should be noted that by comparing the corresponding type of water quality data with standard water quality data, abnormal water quality after purification by the reaction wall can be identified. This allows us to infer whether each purification plate in the reaction wall is functioning properly and whether it has reached the end of its service life, so that staff can be notified to replace it in a timely manner, ensuring the effective operation of the reaction wall and improving its reliability.

[0068] The above description, based on preferred embodiments of the present invention, is quite specific and detailed, but it should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A method for evaluating redox-coupled permeable reactive barriers, characterized in that: The oxidation-reduction coupled permeable reactive wall includes a cover plate, a cement outer wall, a water-proof plate, a reduction chamber, an oxidation chamber, and a mixing chamber. Three water-proof plates are alternately and vertically fixed to the cement outer wall and the top cover plate. The reduction chamber, oxidation chamber, and mixing chamber are separated by the water-proof plates. The reduction chamber and mixing chamber are connected by an upper pipe, and the oxidation chamber and mixing chamber are connected by a lower pipe. The reduction chamber, from bottom to top, is equipped with a detachable coarse quartz sand plate, a fine quartz sand plate, and an active reaction plate. The oxidation chamber, from bottom to top, is equipped with a detachable active reaction plate and an adsorption reaction plate. The mixing chamber is equipped with a stirring device and an oxidant dosing pipe. The coarse quartz sand plate is 10cm thick and filled with coarse quartz sand with a particle size of 1.0mm-2.0mm; the fine quartz sand plate is 10cm thick and filled with fine quartz sand with a particle size of 0.5mm-1.0mm; the adsorption reaction plate is 10cm thick and filled with adsorption material; the surfaces of the coarse quartz sand plate, fine quartz sand plate, adsorption reaction plate, and active reaction plate contain water-permeable holes, and the plate spacing is 5cm; the evaluation method includes the following steps: continuously collecting water quality data fed back by each water quality detection sensor of the reaction wall within a preset time period, constructing a database, and importing the water quality data fed back by each water quality detection sensor into the database; after collection... Afterwards, each water quality data point in the database is considered as a separate cluster, resulting in K clusters, where K is the number of water quality data points. The Manhattan distance between each cluster is calculated, and a distance matrix is ​​generated based on these Manhattan distances. The two clusters with the shortest Manhattan distances are merged into a single merged cluster family, resulting in several merged cluster families. The Manhattan distance between each merged cluster family is recalculated, and the distance matrix is ​​updated based on the recalculated Manhattan distances. This process is repeated until the number of merged cluster families reaches a preset number, at which point the iteration stops, and the clustering results are output. A dendrogram is constructed based on the clustering results, and the water quality data from the database are assigned to the corresponding branches of the dendrogram. After assignment, the dendrogram is... The process involves pruning at the segmentation points to obtain several branches, and mapping the water quality data corresponding to different branches to different data storage spaces to obtain different types of water quality data subsets. The process also includes the following steps: constructing a knowledge graph from the standard discharge water quality data information of the prefabricated reactive water wall after treating different preset types of polluted water sources, and importing the standard discharge water quality data information of the reactive water wall after treating different preset types of polluted water sources into the knowledge graph; obtaining real-time polluted water source information processed by the reactive water wall, importing the real-time polluted water source information into the knowledge graph, and calculating the correlation degree between the real-time polluted water source information and various preset types of polluted water sources using grey relational analysis to obtain multiple correlation degrees.The correlations are sorted, the maximum correlation is extracted, and the pre-defined type of polluted water source corresponding to the maximum correlation is obtained. Based on the pre-defined type of polluted water source corresponding to the maximum correlation, the standard discharge water quality data after the current reactive barrier treatment is determined. Standard curves for different water quality types are constructed based on the standard discharge water quality data. Actual curves for corresponding water quality types are constructed based on subsets of water quality data of different types. An integration space is constructed, and actual curves and standard curves of the same type are imported into the integration space for pairing. After pairing, the actual curves and standard curves are statistically analyzed. The lengths of overlapping line segments and the lengths of non-overlapping line segments are counted. The overlap ratio between the actual curve and the standard curve is calculated based on the lengths of the overlapping and non-overlapping line segments. Actual curves with an overlap ratio not greater than a preset overlap ratio are marked as abnormal curves, and those with an overlap ratio greater than the preset overlap ratio are marked as normal curves. The water quality type corresponding to the abnormal curve is obtained. Based on the water quality type corresponding to the abnormal curve, the lifespan status of the coarse quartz sand plate, fine quartz sand plate, activated reaction plate, and adsorption reaction plate is assessed. An assessment report is generated based on the lifespan status.

2. The evaluation method for a redox-coupled permeable reactive barrier according to claim 1, characterized in that: Water inlet and drainage channels are provided in the cement exterior wall.

3. The evaluation method for a redox-coupled permeable reactive barrier according to claim 1, characterized in that: Valves and flow meters are installed on both the upper and lower pipes.

4. The evaluation method for a redox-coupled permeable reactive barrier according to claim 1, characterized in that: The active reaction plate is 10 cm thick and is filled with a reaction medium including one or more combinations of zero-valent iron, iron-carbon materials and slow-release materials.

5. The evaluation method for a redox-coupled permeable reactive barrier according to claim 1, characterized in that: The adsorbent materials include artificial zeolite, activated carbon, and biochar.

6. The evaluation method for a redox-coupled permeable reactive barrier according to claim 1, characterized in that: It also includes one or more of the following oxidizing agents: hydrogen peroxide, potassium permanganate, and persulfate.

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